▶▶ Pod 153 - Report:

The machine lifeforms not only infected the YoRHa soldier units on the ground, they also infected the <Bunker> with a viral attack, activating a self-destruct sequence.

With this, the 13th Orbital Satellite Base <Bunker> was destroyed. 

2B and 9S avoided infection from the virus and escaped the Bunker before it was destroyed. 
Proposal: Find the remaining surviving YoRHa Soldiers and start another descent-to-ground operation on Earth to fulfill the mission.
Are you okay, 2B!?
‫هل أنت بخير يا 2.بي؟!
Alles in Ordnung, 2B?!
¿Estás bien, 2B?
¿Estás bien, 2B?
Ça va, 2B ?
Stai bene, 2B?
Tudo bem, 2B?!
2B! Как ты?!